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This paper introduces a modified clustering method derived from a combination of mean-shift and x-mean clustering concepts to segment videos in a basic unit of scenes. The proposed clustering method takes account of time differences of images to cluster them into an unset number of groups. The performance of the proposed method was compared to mean-shift and x-means clustering methods. The introduced...
This paper proposes a video audience measurement framework for MPEG-DASH. In current untrustworthy over-the-top (OTT) environments, the proposed framework utilizes segment-hashing to collect and offer video audience measurement to third party organizations while ensuring the protection of consumers' privacy. The system generates hash values for video streaming segments, establishes a video information...
The recording of micro holographic storage is performed by the superposition of two tightly focused counter-propagating beams. The micrograting is affected by misalignment in the z -direction during the recording and read-out processes. Thus, the diffraction efficiency (DE) can be reduced by the defocusing of the micrograting. In this paper, we investigate the recording characteristics of a defocused...
Bragg angle mismatch by tangential and radial tilts is a critical problem in holographic digital data storage. Generally, tangential tilt can be easily compensated for in holographic digital data storage. However, radial tilt is not easily compensated for. In this paper, we propose a new method of radial tilt compensation. The proposed method can compensate for Bragg angle mismatch caused by radial...
We propose a 6LoWPAN-SNMP that enables transmission of SNMP messages over IPv6-enabled low-power wireless personal area networks (6LoWPAN). The 6LoWPAN-SNMP is an extended modification of the Simple Network Management Protocol (SNMP). Compared to traditional IP-networks, 6LoWPAN is a severely resource-constrained network; hence, existing SNMP protocols need to be modified to meet the goals in RFC...
Power management of sensor nodes is essential to maximize the lifetime of wireless sensor networks. Energy consumption of individual sensor node differs greatly depending on its type. Existing operating systems for sensor networks typically leave the power management of sensors to applications. Unless specific features of the sensors and batteries are considered in the application design, energy consumption...
A holographic data storage system fully integrated with electronics for video demonstration has been developed. It records 4 Gigabits video stream in 4 tracks ot photopolymer disk. The data are successfully retrieved and reconstructed without errors
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